Wheatstone Bridge


TOSHNIWAL Portable Wheatstone Bridge PL32.03 is a very precise and portable instrument. This Wheatstone Bridge is designed to afford maximum convenience for a wide range of resistance measurement without the need of external accessories. The resistance coils in ratio & series arms are made from non-inductively wound and aged best quality manganin wires having negligible effect of ambient temperature variation, for long term stability. Switches used in this instrument are of self cleaning type having very low contact resistance & long life. Taut band suspended galvanometer is provided for null detection. Built-in dry cell batteries can be easily replaced. Battery ON/OFF & test keys are provided on the instrument panel.

  •  Measures resistance from 1 milliohm to 11.11 megaohms
  • Use of series arm as Decade Resistance Box
  • Lead resistance compensation provision for measuring low value resistances
  • Higher sensitivity by using external galvanometer
  • Use of additional power supply possible
  • Detection of cable fault by Varley Loop Test method
  • Batteries easily replaceable
  • Separate use of built-in Galvanometer

Measurement Capability

1milliohm---11.11 megaohms

Measurement Ranges

1 milliohm---11.11 ohms
10 milliohms---111.1 ohms
100 milliohms---1.111 k ohms
1 ohm---11.11 k ohms
10 ohms---111.1 k ohms
100 ohms---1.111 megaohms
1 k ohms---11.11 megaohms

Measurement Accuracy

± 0.075 %

Series Arm

10 (1000 +100+10+1) ohms

Accuracy of Series Arm

± 0.05 %

Null Detector Galvanometer

Ri 20 ohms,1mm/ µA sensitivity


3 cells of 1.5 V, R 14 size


370 x 260 x 155 mm approx.


6.4 kgs (approx)


Used in Cable manufacturing industries, Telecommunication Equipment Industries, Chemical, Petro-complex and refineries, Instrumentation, Electronic equipment centres, etc.

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